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Top Chess Engine Championship, formerly known as Thoresen Chess Engines Competition (TCEC or nTCEC), is a computer chess tournament that has been run since 2010. It was organized, directed, and hosted by Martin Thoresen until the end of Season 6; from Season 7 onward it has been organized by Chessdom. It is often regarded as the Unofficial World Computer Chess Championship because of its strong participant line-up and long time-control matches on high-end hardware, giving rise to very high-class chess.
The TCEC competition is divided into seasons, where each season happens over a course of a few months, with matches played round-the-clock and broadcast live over the internet. Each season is divided into several qualifying stages and one “superfinal”, where the top two chess engines play 100 games to win the title of “TCEC Grand Champion”. In the superfinal, each engine plays 50 openings, once as each side. Beginning in Season 11 in 2018, a division system was introduced; the top 2 engines in each division are promoted, and the bottom 2 are relegated. Currently, there are 5 divisions (a Premier division, and divisions 1-4); newcomers generally start in division 4.
PGN:
[Event “TCEC Season 22 – Division P”]
[Site “https://lichess.org/CXILtH4Y“]
[Date “2022.03.27”]
[Round “55.2”]
[White “Stockfish dev15_20220302”]
[Black “ScorpioNN 3.0.15.5”]
[Result “1-0”]
[WhiteElo “3612”]
[BlackElo “3514”]
[Variant “Standard”]
[TimeControl “3600+6”]
[ECO “A42”]
[Opening “Modern Defense: Kotov Variation”]
[Termination “Unknown”]
[Annotator “lichess.org”]
1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 Nc6?! { (0.43 → 1.11) Inaccuracy. Nf6 was best. } { A42 Modern Defense: Kotov Variation } (4… Nf6 5. Nf3 O-O 6. Be2 e5 7. O-O exd4 8. Nxd4 Re8 9. f3) 5. Be3 e5 6. Nge2 Nf6 7. d5 Ne7 8. f3 Nd7 9. Nc1 f5 10. Nd3 b6 11. g4 Nf6 12. Rg1 f4 13. Bf2 g5 14. h4 gxh4 15. Qb3 h5 16. gxh5 Kf8 17. Bxh4 Rxh5 18. Bxf6 Bxf6 19. O-O-O Rh6 20. Kb1 Bd7 21. a4 a5 22. Rd2 Ng6 23. c5 bxc5 24. Nc1 Kf7 25. Qd1 Qh8 26. Bb5 Bxb5 27. Nxb5 Rg8 28. Rdg2 Rh2 29. Rxh2 Qxh2 30. Nb3 Nh4 31. Rxg8 Kxg8 32. Nxa5 Qg2 33. Nb3 Nxf3 34. a5 Ng5 35. a6 Qxe4+ 36. Qc2 Qe1+ 37. Ka2 Qb4 38. Qg6+ Kf8 39. a7 Qa4+ 40. Kb1 Bd8 41. Qc2 Qa6?! { (2.91 → 3.79) Inaccuracy. Kg7 was best. } (41… Kg7 42. Nd2) 42. Qf5+ Nf7 43. Nd2 Kg7 44. Ne4 Qxb5?! { (4.04 → 5.12) Inaccuracy. Kf8 was best. } (44… Kf8 45. Nec3) 45. a8=Q Qd3+ 46. Kc1 Qc4+ 47. Nc3 Qf1+ 48. Kc2 f3 49. Qa4 c4 50. Qad7 Be7 51. Qg4+ Kf8 52. Qc8+ Bd8 53. Qcf5 e4 54. Qgf4 Qg2+ 55. Kc1 Qg1+ 56. Nd1 Qg7 57. Q4xe4 Qg5+ 58. Kb1 Qg2 59. Qee6 Qg8 60. Nf2 c3 61. Ng4 cxb2?! { (12.25 → Mate in 9) Checkmate is now unavoidable. f2 was best. } (61… f2 62. Nh6) 62. Kxb2 Bg5 63. Nh6 Bxh6 64. Qff6 Qg2+ 65. Kb3 Qb2+ 66. Kxb2 Bc1+ 67. Kxc1 Kg8 68. Qexf7# { White wins. } 1-0
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